泡沫Al合金的压缩性能及其能量吸收  

COMPRESSIVE PROPERTY AND ENERGY ABSORPTION OF FOAMED Al ALLOY

作　　者：王斌[1] 何德坪[1] 舒光冀[1] 

机构地区：[1]东南大学材料科学与工程系,南京210096

出　　处：《金属学报》2000年第10期1037-1040,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金!19982001

摘　　要：研究了泡沫纯铝和泡沫ＡｌＳｉ７Ｍｇ０．４５在单向压缩条件下的应力－应变（σ－ε）曲线，分析了它们的变形行为，并讨论了其能量吸收和能量吸收效率结果表明：泡沫纯铝与泡沫 Ａｌ合金的σ—ε曲线均由弹性变形段、平缓段和紧实段组成；在压缩过程中，泡沫纯铝的骨架变形以弯曲为主，泡沫 ＡｌＳｉ７Ｍｇ０．４５的骨架变形主要由局部断裂产生；在相同孔隙率下，泡沫 ＡｌＳｉ７Ｍｇ０．４５的能量吸收大于泡沫纯铝；能量吸收效率与应变有关。The compressive stress-strain curves of foamed pure Al and foamed AlSi7Mg0.45 were studied, and the corresponding deformation behaviors, energy absorption capacity and energy absorption efficiency were discussed. The results show that the stress-strain curves of foamed pure Al and foamed Al alloy consist of elasticity, collapse plateau and densification segments; in compressive procession the mainly Way of the framework deformation is its bending for foamed pure Al and is rupturing for foamed AlSi7Mg0.45. Under the condition of the same porosity the energy absorption capacity of foamed AlSi7Mg0.45 is bigger than that of foamed pure Al and the energy absorption efficiency related to strain has a peak value.

关 键 词：能量吸收 孔隙率 泡沫铝合金 压缩性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]